Electric selector mechanism



June 14, 1932. H. L. KRUM ELECTRIC SELECTOR MECHANISM Original Filed July 16, 1926 EU/ZNZOW F73 flbLUCZ/ZQCZ. mix/7L J M M50 1,783,382, Dec.2,1930.

latented June 14, 1932 -UNITED STATES PATENT orricn HOW'ARD L. KRUM, OF KENILWORT'H, ILLINOIS, ASSIGNOR TO TELETYPE CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE ELECTRIC SELECTOR MECHANISM Original application filed July 16, 1926, Serial No. 122,803. Patent No. 1,783,382, dated December 2, 1930.

Divided. and this application filed September 28, 1930. Serial No. 484,517.

The present application is division of an application filed by me in the United States Patent Office July 16, 1926, Serial No.

122,808, which resulted in Patent No.

The invention relates to electric selector mechanism such as used for controlling the operation of telegraph receivers, printers or the like, and which comprisesa set of selectors that are positioned or conditioned 1n different combinations-in response to code signals comprising ermutations, of two different electrical conditions extending through a definite number of successive time intervals. More particularly, the invention relates to a selector mechanism in which the selectors are mechanically set under the joint control of a locally driven member or shaft, and a member which is selectively vibrated under control of a magnet which responds to the electrical conditions of the code sig nals. I

As pointed out,'in the above noted parent application, such single magnet selector mechanisms having mechanical distributors possess many advantages over those using electrical distributors, but that in such mechanical selector mechanisms, itis desirableto provide means for insuring that the setting of the selectors be determined at definite points or at very brief spaced intervals in the cycle of operation of the locally actuated distributing member so that such points may coincide with and the setting of the selectors be determined by the mid-portions or most effective portions of the intervals of the received signals. Also, as set forth in the parent application, this desirable result is effected by employing a locking device operating in synchronism with the locally driven member or mechanical distributor and which is arranged to engage the member vibrated under control of the selector magnet at definitely spaced points in the cycle of operation of the selector to thereby predetermine the setting of the selectors at such points and hold the controlling member against vibration during I the actual setting of the selectors.

. foregoing parent application and the present application relates more particularly to the type of selector mechanism such as set forth in the prior application of E. E. Kleinschmidt, Serial No. 704,022, filed April 3, 192 1, which resulted in Patent No. 1,811,131, June 23, 1931, and in which a rotary member having aspiral series of setting cams or projections is locally driven in synchronism with the received signals and is variably Vibrated to determine setting of selectors under control of a magnet which responds to the code signals.

The present invention consists in features of lli'lPlOVGIllGlllJ hereinafter set forth, illustrated in the preferred form in the accompanying drawing and more particularly pointed out in the appended claims.

In the drawing:

Fig. 1 is a view illustrating the application of the present improvement to the setrolled by a set of pivoted selecting fingers The latter are pivotally mounted at their lower ends upon a stud 13 fixed to a bracket 11 and springs 15 tend to hold the upper ends of the levers (which are relatively offset as shown in Fig. 2) against a stepped stop plate 16 and in line with lugs 17 on the corresponding permutation bars. The primary selectors or fingers 12 are set or shifted from normal position by a spiral series of cams or pins 18 mounted on a shaft or barrel 19. The latter is rotated during each operation by a continuously driven motor shaft 20 which is connected to a short shaft 21 by a friction clutch 22. Shaft 21 has a forked extension 23 which is engaged by a pin 24: onthe end of the shaft or barrel 19. A reduced extension on the latter extends within the bore ofthe shaft 21 and a spring 26 coiled about this extension tends to shift the pin barrel to the left and holds a. reduced extension. 27 on its other end (which is journaled in the bracket 14) against the armature lever 28 of the magnet 29. A spring 30 tends to hold thearmature lever inengagement with a stop screw 31, but the magnet is normally energized and holds the armature lever against a I stop screw 32 and the barrel or cam shaft in 7 its right-hand position with spring 26 compressed. 7 I

In its normal right-hand position, the pins or cams 18 are in alignment with the primary "selectors or fingers 12, but when the magnet is deen'ergized and the camshaft shifted to the left by spring 26,'these pins are out of "alignment with the corresponding levers.

i i'nits right hand or leftha'nd' position.

latch ofthe]first selecting finger is in the When in alignment therewith and rotated jpast lugs 33 on the corresponding fingers,the latter will be shifted to the left (when viewed as Fig. 2) to move their upper ends out of line with the lugs 17 "of the corresponding permutation bars, and any selected lever Wlll be he'ld in shifted position by the engagement of a latch 34 with a shoulder 34: on the lever. V Normally, as stated, the magnet is energ'ized and in this position a stop pin 35 enggages a stop lug 36 on the bracket. It is 'notedthat the latches a4. are of such width and so located that each of them, except that corresponding to the first selector or finger,

is adapted to be engaged by the corresponding pin or cam 18 whetherthe cam shaft is The path of movement of'thestop pin During the starting interval or unitflvhich precedes the selecting intervalsfof each signal, magnet 29 is deenergized and the shifting of the cam shaft 19 to the left'disengages the stop pin '35 from the lug 36' so that the rotation of the camshaft is initiated. Duringthe'remainder of the'starting intervah'the 'stopjpin'will engage and release the first latch 37 'sothat the first selecting lever is-restored if it has been shifted during the previous selection. Thereafter the latches 34 are sue cessivel'y released by the corresponding pins 18 and the cam shaft during its rotation is also vibrated by the armature lever 28 in response to the differentelectrical conditions extending through the selecting intervals or units of the signal. "gized and the cam shaft in right-hand position'as'the. pins or cams pass into operative rel i'iion with'the lugs 33011 the correspondingse'lectorathe latter will be shifted and l held'in shifted position by the latches 3. 3; ,but

if the magnet is deenergized at any such in- 7' 't'e'rval, the pin or cam'willclear the bevel 33 of the corresponding selector and leave the flatterin its normal position. theend of any printing operation, as described in the the appended claims.

If the magnet .is 'ener above noted Patent No. 1,811,131, the permutation bars 10 are restored and the setting of the primary selectors 12 is transferred there- To look the 'cam shaft against vibrating movement at definite, uniformly spaced points during each selecting cycle, a locking bell cranklever 37 ispivotally mountedupon a portion 38; of the frame and a spring 39 connected to the lever tends to hold a roller 40 thereon in "engagement with a cam disc 11 fixed to the cam shaft or pin barrel 19. The. latter has a series of depressions into which the roller. 10 dropsat uniformly spaced intervals during each rotation of the cam shaft, to bring a knife-edge 12 on the locking lever into engagement with a beveled edge disc 43 on the cam shaft. In this way the camshaft is locked either in its right or lefthand position just before it passes through any of its selector operating positions and the armature lever 28 is thereby rendered ineffective during the settingof the selectors. As indicated, 7 the roller 40' is of sufiicient width to properly engage the camdisc 41 ineither of the positions of the axially movable or vibratory cam shaft.

IVith the improved arrangement, the-selection or settingof the primary selectors or fingers 12 is determined at definitely spaced points in the setting cycle and which, by the orientation or adjustment of the stop for the rotatable member, can be caused to register I with the mid-portions or most effective porfollowing intervals in which the setting of the selectors is effected. V

2; In a selector mechanism for telegraph. receivers, a set of'selectors, a rotary member for effecting. the setting of said-selectors, means controlled by received impulses for ially moving said rotary member to determine the setting of said selectors, and means for holding the rotary member in one or the other of its selecting conditions during the intervals in which the'setting of the selectors is effected.

3. Ina selecting mechanism for telegraphs, k

a set of selectors, a rotary, locally driven member. for effecting the setting of'said selectors, an electro-magnet responsive to received impulses, for controlling the axial movement of said rotary member between two different selecting conditions, and assoelated means effective at definite, spaced points in the setting cycle for maintaining.

said member in one or the other of its selecting conditions during the intervals in which the setting of the selectors is effected.

4. In a selector mechanism, a set of selectors, an electro magnet, a locally driven r0- tary member for effecting the setting of said selectors, means controlled by said magnet for axially moving said rotary member to determine the setting of said selectors, a disc and a notched cam on said rotary member, and a locking device vibrated by said cam and cooperating with said disc to hold said rotary member against axial movement.

5. In a selector mechanism, a set of selectors, a rotary, axially movable, selector actuator, a magnet for controlling the axial vibration of said actuator between two selecting conditions to thereby determine the setting of said selectors, and means effective at uniformly spaced points in the setting cycle for holding said member in one or the other of its selecting conditions.

6. In a selector mechanism, a set of selectors, an electro magnet, a locally driven rotary member for effecting the setting of said selectors, means controlled by said magnet for axially moving said rotary member to determine the setting of said selectors, a disc and a. notched cam on said rotary member, and a locking device vibrated by said cam and cooperating with said disc to hold said rotary member against axial movement, said disc and locking device having cooperating beveled edges and said locking device being spring-pressed toward said cam and disc.

7. In a selecting mechanism for telegraphs, a set of selectors, a locally driven rotary member having a series of spaced cams for setting said selectors, a magnet responsive to received impulses, means controlled by said magnet for longitudinally moving said rotary member to selectively determine the setting of said selectors by said cams, and means for holding said member in one or the other of its selecting conditions during the intervals in which said cams are in operative relation with the corresponding selectors.

8. In a telegraph receiver, a shaft, means operative upon the rotation of said shaft for effecting a series of selecting operations,

means responsive to received impulses for moving said shaft longitudinally to variably determine said selecting operations, and means effective upon each such movement for holding said shaft against further longitudinal movement for predetermined intervals thereafter. 7

9. In a telegraph receiver, a rotating device, locally actuating means for rotating said device.v means controlled by received impulses for selectively positioning said device, means effective at definite spaced points in the cycle of operation of said rotating device for'ho1d ing the same in selected condition for predetermined intervals, and a set of selectors conditioned by the rotary movement of said de vice during such intervals.

10. In a receiver for telegraphs, a set of selectors, a device locally rotated to effect the setting of said selectors in different combinations, said rotating device being operatively responsive to received current impulses and means for rendering said device unresponsive to the current impulses at definite spaced intervals in its selector setting cycle.

11. In a receiver for printing telegraphs, a set of selectors, a shaft having a series of selector setting cam members, means for rotating said shaft to bring the cam members into operative relation with said selectors, means for selectively operating said shaft in response to received current impulses, and means for rendering said shaft unresponsive to received impulses during the intervals in which said cam members are in operative relation with the corresponding selectors.

12. In a telegraph receiver, a set of cam members, a set of selectors, means whereby said cam members are successively responsive to received current impulses for variably operating said selectors, and means for rendering said cam members unresponsive to the current impulses during the intervals in which said cam members are in operative relation with said selectors.

13. In a telegraph receiver, selecting members, a shaft having a plurality of cam members, each operative upon one of said selecting members, means for rotating said shaft to bring said cam members successively into operative relation with said selecting members, means responsive to received current impulses for positioning said cam members as they are brought into operative relation with the corresponding selecting members, and means effective upon each positioning of said cam members for locking each cam member to complete its operation.

14. In a telegraph receiver, a set of primary selectors, a set of actuating members each operative upon one of said selectors, locally driven means for bringing said actuating members and said selectors successively into operative relation, means responsive to received current impulses for effecting a relative movement between the set of ac tuating members and the set of selectors to determine the setting of the selectors, and means for rendering the current impulses in effective at definite spaced points in the operating cycle and during the intervals in which the actuating members are operative upon the corresponding selectors.

15. In a printing telegraph receiver, a set of selectors, a rotating shaft, means operated thereby for setting said selectors, means for moving said shaft longitudinally to deter- .mine the setting of said selectors in response to received impulses, and means for locking u said shaft against longitudinal movement at predetermined pointsin its rotary path of I movement.

16. In a telegraph receiver, a set of selectors, an actuating member locally rotated to effect the setting of said selectors, means responsive to received current impulses for effecting a relativevibratory movement between sa'id member and the set of selectors in a direction axially of said member and 10- cally actuated means for rendering the current impulses ineffective at definite spaced points in the operating cycle and during the intervalsin which the actuating member is operative upon the selectors.

' HOWARD L. KRUM. 

